"As summer moves forward, the days of dropping summer gas prices appear to be behind us for now," said Jeanette Casselano, AAA Spokesperson. "U.S. crude inventories are moving in the opposite direction of demand — a perfect storm for continued price increases heading into August."

The average fuel economy of new vehicles sold in the U.S. in December fell to 25 mpg — down 0.2 mpg from a revised November value, according to Brandon Schoettle and Michael Sivak, researchers from the University of Michigan's Transportation Research Institute (UMTRI).

The national average price of unleaded gasoline jumped 5 cents to $2.49 per gallon in the first week of 2018 and has reached a level not seen since 2014 during the week that starts the new year, according to AAA.

China is setting a deadline for automakers to end the sale of fossil-fuel powered vehicles as the country looks to reduce oil consumption and pollution and push for the development of electric vehicles. Regulators are working on a timetable for the ban.